Which of the following drugs is a powerful CNS stimulant?

Select one:
a. methamphetamine
b. heroin
c. marijuana
d. alcohol
e. All of the answer choices are powerful CNS stimulants.


a. methamphetamine

Biology & Microbiology

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“Prebiotic soup” refers to ____

a. the interior contents of protocells b. the cytoplasm of early prokaryotic cells c. the mix of gases in the atmosphere that gave rise to the first organic molecules d. the polymerized slime coating ancient clay particles e. the accumulation of organic molecules that formed in the oceans before there was life on Earth

Biology & Microbiology

The interaction of a biotic community and its abiotic environment is referred to as a(n)

A) biosphere. B) ecosystem. C) population. D) biome.

Biology & Microbiology

Which of the following can be used for the cultivation of viruses?

A.) Enriched broth media B.) Viral host cells grown in vitro C.) Enriched agar media D.) All of these choices.

Biology & Microbiology

You note a fuzzy growth on some of the gels in your incubator. What is the name given to this step of the scientific method?

a. observation b. theory c. hypothesis d. law e. confirmation

Biology & Microbiology